blob: 00d2767db07b1bb394fea057efe2a2c4d3866d5a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
//========================================================================
// GLFW - An OpenGL framework
// File: win32_glext.c
// Platform: Windows
// API version: 2.6
// WWW: http://glfw.sourceforge.net
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Camilla Berglund
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
#include "internal.h"
//========================================================================
// We use the WGL_EXT_extensions_string if it is available, or
// WGL_ARB_extensions_string if it is available.
//========================================================================
typedef const char *(APIENTRY * WGLGETEXTENSIONSSTRINGEXT_T)( void );
typedef const char *(APIENTRY * WGLGETEXTENSIONSSTRINGARB_T)( HDC hdc );
//************************************************************************
//**** Platform implementation functions ****
//************************************************************************
//========================================================================
// Check if an OpenGL extension is available at runtime (Windows version checks
// for WGL extensions)
//========================================================================
int _glfwPlatformExtensionSupported( const char *extension )
{
const GLubyte *extensions;
WGLGETEXTENSIONSSTRINGEXT_T _wglGetExtensionsStringEXT;
WGLGETEXTENSIONSSTRINGARB_T _wglGetExtensionsStringARB;
// Try wglGetExtensionsStringEXT
_wglGetExtensionsStringEXT = (WGLGETEXTENSIONSSTRINGEXT_T)
wglGetProcAddress( "wglGetExtensionsStringEXT" );
if( _wglGetExtensionsStringEXT != NULL )
{
extensions = (GLubyte *) _wglGetExtensionsStringEXT();
if( extensions != NULL )
{
if( _glfwStringInExtensionString( extension, extensions ) )
{
return GL_TRUE;
}
}
}
// Try wglGetExtensionsStringARB
_wglGetExtensionsStringARB = (WGLGETEXTENSIONSSTRINGARB_T)
wglGetProcAddress( "wglGetExtensionsStringARB" );
if( _wglGetExtensionsStringARB != NULL )
{
extensions = (GLubyte *) _wglGetExtensionsStringARB(_glfwWin.DC);
if( extensions != NULL )
{
if( _glfwStringInExtensionString( extension, extensions ) )
{
return GL_TRUE;
}
}
}
return GL_FALSE;
}
//========================================================================
// Get the function pointer to an OpenGL function
//========================================================================
void * _glfwPlatformGetProcAddress( const char *procname )
{
return (void *) wglGetProcAddress( procname );
}
|